where \(\sigma _T\)  is the Thomson cross-section and \(e\)  is the electron charge [1]}, [2]}.
For \(\nu > \nu _c\) , the flux density becomes [2]}:
\(f_{\nu }(t) \propto \nu ^{-p/2} \, t^{(6\alpha _r +(8-5p)\alpha _B+2(p-2)\alpha _{\gamma } -4p+2)/2}.\) 
